Google says you have a conflicting account

When Google says you have a conflicting account, it means that you used your @toast.net email address with another Google service before Google switched to a unified sign-in system to access a variety of Google products. For example you may have used Picassa Web to save some pictures.

Proceed with the steps below to resolve the conflict. Note that this does not affect your email address or the messages in your @toast.net mailbox.